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| Status |
Public on Sep 20, 2013 |
| Title |
DNA replication and DSB factor binding in the meiotic S-phase checkpoint in budding yeast |
| Organism |
Saccharomyces cerevisiae |
| Experiment type |
Genome binding/occupancy profiling by genome tiling array
Genome variation profiling by genome tiling array
|
| Summary |
During gamete formation, crossover recombination must occur on replicated DNA to ensure proper chromosome segregation in the first meiotic division. We identified a Mec1/ATR-dependent replication checkpoint in budding yeast that prevented the earliest stage of recombination, the programmed induction of DNA double-strand breaks (DSBs), when pre-meiotic DNA replication was delayed. The checkpoint suppressed DSBs through three complementary mechanisms: inhibition of Mer2 phosphorylation by Dbf4-dependent Cdc7 kinase, preclusion of chromosomal loading of Rec114 and Mre11, and lowered abundance of the Spo11 nuclease. Without this checkpoint, cells formed DSBs on partially replicated chromosomes. Importantly, such DSBs frequently failed to be repaired and impeded further DNA synthesis, leading to a rapid loss in cell viability. We conclude that a checkpoint-dependent constraint of DSB formation to duplicated DNA is critical not only for meiotic chromosome assortment, but also to protect genome integrity during gametogenesis.
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| Overall design |
DSB factor association was measured in wild-type and checkpoint mutants strains under non-inducing or replication checkpoint inducing conditions. Additionally, DNA replication and helicase loading were measured in a replication and checkpoint deficient strain (cdc6-mn).
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| |
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| Contributor(s) |
Blitzblau HG, Hochwagen A |
| Citation(s) |
24137535 |
| |
| Submission date |
May 10, 2013 |
| Last update date |
Jul 18, 2017 |
| Contact name |
Andreas Hochwagen |
| E-mail(s) |
andi@nyu.edu
|
| Organization name |
New York University
|
| Lab |
Hochwagen lab
|
| Street address |
1009 Silver Center 100 Washington Square East
|
| City |
New York |
| State/province |
NY |
| ZIP/Postal code |
10003 |
| Country |
USA |
| |
|
| Platforms (1) |
| GPL5991 |
Agilent-015239 Yeast Whole Genome ChIP-on-chip Microarray (G4493A) |
|
| Samples (31)
|
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| This SuperSeries is composed of the following SubSeries: |
| GSE46839 |
ChIP-chip of DSB factors in the presence and absence of S phase checkpoint induction |
| GSE46840 |
CGH mesurement of DNA replication in wild-type and cdc6-mn replication deficient strains. |
|
| Relations |
| BioProject |
PRJNA202447 |
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